.
It's not clear from this description what you are modelling. Is it
mortality rates?
Second, when you say that you have used aggregated data, is this data
that you have aggregated or was the data already in aggregated form?
______________________________________________
Kieran McCaul MPH PhD
WA Centre for Health & Ageing (M573)
University of Western Australia
Level 6, Ainslie House
48 Murray St
Perth 6000
Phone: (08) 9224-2140
Fax: (08) 9224 8009
email: [email protected]
http://myprofile.cos.com/mccaul
http://www.researcherid.com/rid/B-8751-2008
______________________________________________
The fact that no one understands you doesn't make you an artist.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Martin Weiss
Sent: Sunday, 8 February 2009 7:55 PM
To: [email protected]
Subject: st: FWD: poisson regression on aggrgregated data
<>
Dear [Redacted],
short answer: I do not know! BTW, it is not clear to me why you want to
tap
only my wisdom when you can have the entire list. So I am forwarding
this
topic to the list for you...
HTH
Martin
_______________________
Dear Martin
I would like to ask the following question.
I have used poisson regression on aggrgregated data with 2 covariates
(in a
cohort of HIV positive pationts)
1.year of starting 3+ antiretroviral treatment (1997, 1998+)
2.time since starting 3+antiretrovirals (0-1, 1-2, 2+)
and I have predicted incident rates in this aggregated data using
predict
option after the poisson model.
Now my question is if I want to have predicted incident rates for
patints
starting 3+ arvs at 2000 and time since starting 3+ arvs , 3_4 years
is it correct to use the same predicted incident rate obtained for
aggregated data and in this example use predicted incident rate for
1998+
and 2+?
It would be graitly apreciated if you could answer my question, Please
let
me know if you would like me to provid more details.
Thank you very much in advance,
Kind regards,
Shell
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